The various and Popular Trenchless Sewer Pipe Repair Methods used Today
Gone are the days of mainly using open cut pipe replacement excavations for pipe repair. The trenchless pipe repair methods have become the new and primary solutions in restoring pipes back to being fully functional. Trenchless pipe repair isn’t a singular solution since it actually has a multitude of applications that branch out from its core method, which basically eliminates or minimises the need in digging up pipes for repairs. Anyway, check out some of the various and popular trenchless pipe repair methods that are being constantly used in restoring sewer pipelines.
First of all, it’s important that you should know that there are two major types of trenchless pipe repair which are pipe rehabilitation and pipe replacement. Trenchless pipe rehabilitation basically restores the pipeline to its former glory by plugging in a new and top notch pipe or pipe-like structure through a manhole, excavation, or any other entry point. This method gets rid of any dredging or at least lower the destruction brought by tiny excavation that you can simply ignore the damage. On the other hand, we have the trenchless pipe replacement which actually needs a bit of excavation, but don’t be discouraged by its requirement for digging since it poses insignificant damage to the surroundings if you contrast it with open cut excavations which produced large scale digging operations.
Just like its namesake, this method involves pulling a resin liner into the host pipe, which is then cured through the process of steam or exposing the resin with high temperature. The curing process allows the resin to properly attach or bond with the current pipe. As a result, the liner will then fill the cracks or gaps present in the sewer pipe while also boosting the durability of the frail and old pipe lining. Basically, the pulled resin liner becomes the main pipeline of the sewer system. Most of the time, epoxy resin is used in rehabilitating sewer pipes since it’s very durable, can repel chemicals, less prone to corrosion, and doesn’t have any toxic chemicals with its composition.
Cured in Place Pipe or CIPP
CIPP actually uses the same fundamental process of pull-in-place lining in which a pipe liner is added into the pipe that needs to be repaired. The key difference between the two is how the resin liner is inserted. You see, in pull-in-place lining, it requires two entry/exit holes for the pipes to be pulled out by the machinery. CIPP on the other hand only needs one access point. In CIPP, the liner is attached onto a bladder to make it easier for the pipe to be placed and strategically positioned into the pipe lining. Through the use of air or water inversion, the resin liner will then bond properly to the pipe lining. Just like pull-in-place lining, the resin is cured.
This is completely different with the methods mentioned before since moling is more of a trenchless pipe replacement solution. There is digging equipment or also known as the “moling” tool that is used to create an underground pathway for the pipe.